<div class="nav">
   <div layout layout-align="stretch">
      <div flex="20">
         <div layout>
            <div flex="40">
               <img class="fd-logo" src="./images/fd.png">
            </div>
            <div flex="60">
            </div>
         </div>
         
      </div>
      <div flex="80">
         <ul>
         </ul>
      </div>
   </div>
</div>